Reflected wavefront manipulation based on ultrathin planar acoustic metasurfaces.
Reflected wavefront manipulation based on ultrathin planar acoustic metasurfaces.
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基于超薄平面声学超表面的反射波前操纵
DOI：
10.1038/srep02546
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发表时间：
2013
影响因子：
4.6
通讯作者：
Cheng, Jian-chun
中科院分区：
文献类型：
--
作者：
Li, Yong;Liang, Bin;Gu, Zhong-ming;Zou, Xin-ye;Cheng, Jian-chun
亚曲面的引入更新了斯内尔定律，并开辟了新的自由度，可以随意定制光学波前。在这里，我们从理论上证明了基于超薄平面声学亚表面的反射声波可以得到广义斯奈尔定律。变形表面由8个实体结构单元构成，通过盘绕空间提供覆盖整个2π跨度的离散相移和π/4的步长。通过仔细选择亚表面横向的位相分布，展示了一些令人着迷的波前工程现象，如反常反射、传播波到表面波的转换、平面无像差透镜和平面声轴棱镜产生的无衍射贝塞尔光束。我们的结果可能会为声波波前工程和操纵开辟一条新的途径。
The introduction of metasurfaces has renewed the Snell's law and opened up new degrees of freedom to tailor the optical wavefront at will. Here, we theoretically demonstrate that the generalized Snell's law can be achieved for reflected acoustic waves based on ultrathin planar acoustic metasurfaces. The metasurfaces are constructed with eight units of a solid structure to provide discrete phase shifts covering the full 2π span with steps of π/4 by coiling up the space. By careful selection of the phase profiles in the transverse direction of the metasurfaces, some fascinating wavefront engineering phenomena are demonstrated, such as anomalous reflections, conversion of propagating waves into surface waves, planar aberration-free lens and nondiffracting Bessel beam generated by planar acoustic axicon. Our results could open up a new avenue for acoustic wavefront engineering and manipulations.
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影响因子：
8.6
作者：
Liang, Bin;Yuan, Bo;Cheng, Jian-chun
通讯作者：
Cheng, Jian-chun
影响因子：
8.6
作者：
Ding, Yiqun;Liu, Zhengyou;Shi, Jing
通讯作者：
Shi, Jing
影响因子：
19.4
作者：
Ni, Xingjie;Ishii, Satoshi;Shalaev, Vladimir M.
通讯作者：
Shalaev, Vladimir M.
影响因子：
8.6
作者：
Christensen, J.;Martin-Moreno, L.;Garcia-Vidal, F. J.
通讯作者：
Garcia-Vidal, F. J.
影响因子：
41.2
作者：
Boechler, N.;Theocharis, G.;Daraio, C.
通讯作者：
Daraio, C.